html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #000;
}

.bg-img {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url(/static/picture/background.png) no-repeat center center fixed;
  background-size: cover;
  background-color: #000;
  opacity: 0.5;
  filter: alpha(opacity=50);
}

.content {
  font-family: "Avenir-Next", Avenir, Helvetica, sans-serif;
  color: #fff;
  background-color: none;
  z-index: 2;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
}

h1 {
  font-size: 80px;
  margin-bottom: 30px;
  margin-top: 0;
}

h2 {
  margin-top: 0;
  max-width: 700px;
  font-size: 30px;
  width: 90%;
}

p {
  text-align: left;
  padding-bottom: 32px;
}

.btn {
  display: inline-block;
  border: 1px solid #aaa;
  border-radius: 40px;
  padding: 15px 30px;
  margin-right: 15px;
  margin-bottom: 10px;
}
.btn:hover {
  color: #e2e2e2;
  background: rgba(255, 255, 255, 0.1);
}

@media only screen and (max-width: 480px) {
  .btn {
    background-color: white;
    color: #444444;
    width: 100%;
  }

  h1 {
    font-size: 120px;
  }
}